Subsequently, an amount of
TEOS (tetraethyl orthosilicate) was added. The resulting mixture
was stirred for 8 h at 40 ◦C and then aged for 15 h at 100 ◦C.
The mole fraction of each component for as-synthesized SBA-15
was 1 TEOS:0.0168 P123:5.854 HCl:162.681 H2O